To evaluate a star-shaped incision technique to thick-gingiva and thingingiva patients treated with implant-supported fixed prosthesis. The star-shaped incision would be an effective and simple method to reconstruct gingival papillae and avoid the gingival recession in thick-gingiva patients treated with implant-supported fixed prosthesis, and it is worthy of clinical extend.
Objective: To evaluate a star-shaped incision technique to thick-gingiva and thin-gingiva patients treated with implant-supported fixed prosthesis. Methods and Materials: 24 patients received cross-shaped incision were assigned into thick-gingiva group (16 cases) and thin-gingiva group (8 cases). Follow-up examination was carried out 3 and 12 months after final restoration. Clinical and radiographic evaluation including gingival papilla height, modified plaque index, modified sulcus bleeding index, periodontal depth, and crestal marginal bone level were utilized.
Study Type
OBSERVATIONAL
Enrollment
24
The biotype of gingival was determined by periodontal probe.
West China Hospital of Stomatology
Chengdu, Sichuan, China
Papilla height
Presence/absence of papilla height was assessed visually according to the papilla index proposed by Jemt
Time frame: Between June 2019 and June 2021
Modified Plaque Index (mPI)
plaque accumulation around the marginal peri-implant tissue was assessed by the criteria of mPI
Time frame: Between June 2019 and June 2021
Modified Sulcus Bleeding Index (mBI)
the bleeding tendency of the marginal peri-implant tissue was evaluated using mBI
Time frame: Between June 2019 and June 2021
Probing Depth (PD, mm)
PD was assessed at the mid-buccal, mid-oral, mesial and distal aspects of the buccal surfaces of each implant with a standard periodontal probe, and final value was determined by the average of four aspects.
Time frame: Between June 2019 and June 2021
Gingival margin level (GML)
gingival margin level was assessed by calculating the vertical distance between the most apical point of gingival margin at the buccal aspect of the crown and line connecting the peak of the adjacent mesial and distal natural teeth (PMD)
Time frame: Between June 2019 and June 2021
The landmarks of first bone-implant contact (fBIC) and implant shoulder (IS)
fBIC-IS was defined as the vertical distance the first bone-implant contact to implant shoulder, and the distance was assessed at the mesial and distal aspect of implant, respectively. When the marginal crestal bone was located coronal to the IS, a positive (+) value was given, where a negative (-) value when located apically to the IS, the value was deemed as zero when IS and fBIC coincided. The crestal bone level at the time of impression taking was regarded as baseline. The known implant length was used for the calibration of dimensional distortion in the radiograph (the length of implant was 10 mm).
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Time frame: Between June 2019 and June 2021